Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (11): 110202-110202.doi: 10.11889/j.0253-3219.2017.hjs.40.110202

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Correction of radioactive waste drums wedge-disturbing effect of segmented gamma scanning

LIU Yuqi1, TUO Xianguo1,2,3, SHI Rui1,2,3, ZHENG Honglong1   

  1. 1 Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China;
    2 School of Chemical and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China;
    3 State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
  • Received:2017-01-03 Revised:2017-05-09 Online:2017-11-10 Published:2017-11-08
  • Supported by:
    Supported by National Natural Science Foundation of China (No.41374130, No.41604154), the Opening Project of Key Laboratory of Artificial Intelligence in Sichuan Province (No.2016RYJ08), the Sichuan Science and Technology Project of China (No.2017GZ0359), the Sichuan Military and Civilian Development of Special Funds (No.16zs9101)

Abstract: Background: Segmented gamma scanning (SGS) measure is an important technique for qualitative and quantitative analysis of nuclear scrap and radioactive waste (NSRW). Purpose: This study aims to improve the accuracy of the point source activity of NSRW measured by SGS for each segment with compensation of the wedge-disturbing effect. Methods: The calibration coefficients of each segment were determined by the method of inter-segment compensation. Monte-Carlo simulation and experimental measurements were employed to accurately calibrate the detected region overlap of the segments using HPGe detector. Results: The experimental results show the wedge-disturbing effect can be effectively removed with this proposed method. The relative error is within 10% of the experimental value and the accuracy in the estimate of point source activity increases by 5%. Conclusion: The correction analysis using calibration coefficient is feasible and effective for SGS technique.

Key words: Radioactive waste, SGS, Wedge-disturbing, Monte-Carlo simulation, Quantitative analysis

CLC Number: 

  • TL99